1) BENEFITS - 100% protection against DJI main battery shutdown (for any reason) in flight, cell failures, voltage sags, weather induced problems etc. Even if the TB4X main battery SHUTS OFF, the Inspire will keep flying on auxiliary battery power to get you home safely. - Longer flight time. This thread documents flights on the Inspire v1 with an X3 camera of over 30 mins to 10%. Your rig and battery config will vary but you can definitely stay up longer. - Less strain on main DJI TB4X batteries. Because DJI batteries are 10C, and with X5 and X5R putting more strain in these low C batteries, connecting up higher C external batteries significantly lessens the strain on the main battery as all batteries discharge together, providing power to the aircraft. 2) HOW TO - For do-it-yourselfers: Dropbox - Battery Mod DJI inspire.pdf Credit to Michael Head for putting together the how to PDF. - If you don't feel like doing the modification yourself, there are companies out there now that will do it for you for a fee, usually in the $75/battery range. I am aware of these two, ping me if you know of others and I can add them here: In the US: - Inspire 1 Power Mod - Midwest Horizon FPV Antennas - FlyHighUSA - includes new white TB48, mount, mod, etc: DJI Inspire Battery Mod TB48 - FlyHighUSA - includes new black TB48, mount, mod, etc: DJI Inspire Battery Mod TB48 In the UK: - FlyHighUSA will ship worldwide, see link above. - Inspire 1 3 Power Mod V2 3) HOW TO ATTACH EXTERNAL BATTERIES Methods can vary but are a lightweight but strong battery holder plate for folks with the X3, X5 or X5R camera I helped design with Neil Watts. (I get no remuneration from this, just glad to help others who want to do the mod get going quickly): DJI Inspire 1 X3/X5 Dual Battery Plate - Aero3D 4) ADDITIONAL TIPS: - if you are connecting one 6S or two 3S's (via series harness), you only need one set of wires coming out of the battery. - If connecting two 6S's (my personal preference due to the Inspire's unique design and the ability to more easily mount and balance them), you can plug one in on either side of the modified battery OR connect the 2 X 6S external batteries via parallel harness first, then plug into one side of the modified battery.